Gauge



Jan. 16,4923.

` 1,442,333. c. 1. GAUGH.

GAUGE.

FILED JAN. 5, 1920.

[IVI/6471,76 TMW 2'; .r ssc riad TMW I8 fic. 6 #una ama/5 W m1 7 r sance' /2'7/155 $725 /z=/" Patented Jan. i6. i923.

se L e.; a .t s. .an Ml tali? GAUGE.

Application filed January 5, 1920.

.To all @07mm t may cov/cern.'

Be it known that l. C ,un citizen of the United Sintes. resid; lVest Millcreek, in the county ot Erie n' State of Pennsylvania. hare invented new and useful improvements in (langes, ot which the following is a specificati` More particularly the invention is designed to gauge or determine error in the pitch of screw threads. Screw threads are usually designed with a pitch to give a certain number or" threads per inch. Practically all standard threads as used can be gauged with pointers one inch apart. Sonie threads majv be ganged with a smaller i tance, as 'for instance, even --uumheiw threads. @n the other hand it is preferable with some threads in order to emphasize the error to include greater distances than one inch, as for instance, two inches.

The invention is illustrated in the accom panying drawings as follows F ig. l shows a front view of the device;

Fig. 2 a section on the line A-A in Fi l;

ig. 3 a section on the line B-B in Fi .2;

ig. 4 an end elevation of the pointer holder;

Fig. 5 a section on the line A-B in dig. 6 an enlarged view of a master gauge an Fig. 7 an end view of such gauge.

l marks a thread which is to be gauged.

The point holding sleeve 2 is preferably square in cross section. It is provided with a fixed point 3, this point being adapted to enter between two threads. The holder 2 has a plurality of openings t so that the point 3 may be changed for one-halt inch spaces or for a two inch space.

A sliding bar 5 is mounted in the holder 2 and a movable point 6 is mounted in a slot 7 in this sliding bar. The pointer eX- tends through a slot 2A in the holder The mounting of the movable point is preferably made pivotal by means of a pin 8. The end of the bar 5 is tapered at 9 and a nut l0 is screwed onto the screw-threaded end lli. of the bar. The nut has a tapered surface 12 which engages the tapered-surface 9.

By loosening the nut l0 the movable point 6 is loosened so that the points may be placed in the master gauge and accurately positioned by that gauge, the movable the dial 29, the slot being Serial No. 349,470.

pointer swinging on its pivot to assist in this adjustment. By then screwing up the nut the point G may he locked in the ad justed position. A plug is preferably arranged in an opening in the end oit t-he bar 5 to prevent the outer end collapsing` so that the point 6 may be more directl clamped with the wedge surfaces termed by the tapered surfaces 9 and l2.

A dial body lil is secured to the holder 2 by means oiE screws l5. The sliding bar 5 is provided with a notch 16 in which is a bearing pin 17. A lever 18 has its end entending into a slot 17a in the pin 17. The lever 18 is jcui'naled on a screw 2 9 secured in the body. Springs 2O arc secured to the body by means oi* screws and hold the parts in their normal position. The lever operates over a guide plate 22 and is provided with a pin 23 which extends through a slot 2e in the dial pointer 25. The dial pointer has an opening 26 through which a screw 27 extends so as to journal the dial pointer. The dial pointer has an outward bend which carries it through a slot 28 in the -face olf co centric with the screw 27. rlhe dial is graduated at 3() showing the pointer movement. Tl e bod;v is provided with a finger piece 3l by which the gauge may be more conveniently handled.

ln operation the points G and i8 are thrust between threads as clearly shown `in Fig. i. If there is any error in these threads it resuits in a movement ot the movable point t5 and with it movement ot the slide 5. This movement is communicated through the lever 1S to the pointer 25 and the pointer 25 indicates on the dial the error. lt will be readily observed that the lever system increases the movement of the dial pointer 25 very much over the movement of the point 6 so that the slightest error is readily readable on the dial. lt will be noted that the dial pointer is directly connected with the lever so that there is no chance ttor the disarrangement or displacement between the sliding bar and the pointer.

What l claim as new iszl. ln a gauge, the combination ot sleeveshaped point holder; a fixed pin mounted thereon; a sliding` bar in the holder; a pin mounted on'the bar and pivotally adjust-- able thereon; means for locking the piu in adjustment on the bar; a dial; a pointer operating on the dial; and devices transmiton said holder; a sliding bar in the holderI- said bar having a slot therein; a pin arranged in the slot and pivotally mounted relatively to the bar; means tor locking the pin in adjustment in the slot; a dial; a dial pointer operating on the dial; and devices 4 transmitting a movement of the har to the pointer, sai-d devices increasingv the movement of the pointer over that of the pin.

In a gauge, the eombination of a pointholder in the form of a sleeve; a fixed pin thereon; a sliding bar in the sleeve said bar having a slot therein and a tapered end; a pin pivota-lly mounted in the slot; a nut arranged on the end of the bar and operating on the tapered end for contracting the slot to lock the movable pin in adjustment; a dial; a dial pointer operating on the dial; and devices transmitting a movement of the har to the pointer, said devices increasing the movement of the dial pointer over that of the pin.

4. ln a gauge, the combination of a pointholder in the form oi? a sleeve, said sleeve having a pin slot in one end thereof; a lined pin on the holder; a sliding har the sleeve; a pin mounted on the har and er1-- tending through the slot inthe holder means for locking the pin in adjustment relatively to the bar; a dial; a dial pointer operating on the dial; and devices transmitting a movement of the har to the pointer, said devices increasing the movement of the dial pointer over that oit the pin.

In testimony whereof l have hereunto set my hand.

CLYDE J. GAUGE. 

